TI TP3420AV309/63SN

The TP3420A is an enhanced version of the TP3420, with a number of upgraded features for compliance with the new release of ANSI T1.605-1991 and CCITT I-430. At initial power-up the device is fully backwards compatible with the TP3420 device, and modifications to the firmware are only required to take advantage of the new features. The TP3420A S Interface Device (SID) is a complete monolithic transceiver for data transmission on twisted pair subscriber loops. It is built on National’s advanced 1.0 micron double-metal CMOS process, and requires only a single +5V supply. All functions specified in CCITT recommendation I.430 (1991) and ANSI T1.605 (1991) for ISDN basic access at the “S” and “T” interfaces are provided, and the device can be configured to operate either in a TE (Terminal Equipment), in an NT-1 or NT-2 (Network Termination) or as a PABX line-card or trunk-card device. As specified in I.430, full-duplex transmission at 192 kb/s is provided on separate transmit and receive twisted wire pairs using inverted Alternate Mark Inversion (AMI) line coding. 2 “B” channels, each of 64 kb/s, and 1 “D” channel at 16 kb/s are available for users’ data. In addition, the TP3420A provides the 800 b/s “S1”, “S2” & “Q” multiframe channels for Layer 1 maintenance. All I.430 wiring configurations are supported by the TP3420A SID, including the “passive bus” for up to 8 TE’s distributed within 200 meters of low capacitance cable, and point-to-point and point-to-star connections up to at least 1500 meters (24AWG). Adaptive receive signal processing ensures low bit error rates on any of the standard types of cable pairs commonly found in premise wiring installations when tested with the noise sources specified in I.430.

• 2B+D 4-wire 192 kb/s transceiver
• Selectable TE or NT mode
• Exceeds I.430 range: 1.5 km point-to-point
• Adaptive receiver for high noise immunity
• Adaptive and fixed timing options for NT-1
• Clock resynchronizer and elastic buffers for NT-2/LT
• Slave-slave mode for NT-2 trunks
• Extensive hardware support for SC1, SC2 and Q channel messaging
• Bipolar violation detection and FECV messaging
• Selectable system interface formats
• MICROWIRE and SCP compatible serial control interface
• TP3054/7 Codec/Filter COMBO compatibility
• Single +5V supply
• 20-pin package DIP, PLCC

• Same Device for NT, TE and PBX Line Card
• Point-to-Point Range Extended to 1.5 km
• Point-to-Multipoint for all I.430 Configurations
• Easy Interface to: LAPD Processor MC68302, HPC16400 Terminal Adapter MC68302, HPC16400 Codec/Filter COMBO TP3054/7 and TP3076 “U” Interface Device TP3410 Line Card Backplanes — No External PLL Needed
• Line Monitor Mode for Test Equipment